/*
 * This file is part of the eccOS Library.
 * Copyright (C) 2007.
 *
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 */
package org.openeccos.widgets;

import java.util.List;

import nextapp.echo2.app.Border;
import nextapp.echo2.app.Color;
import nextapp.echo2.app.Extent;
import nextapp.echo2.app.Insets;
import nextapp.echo2.app.list.ListModel;

import org.openeccos.util.EccosDefaultLookAndFeel;
import org.openeccos.util.PDUtil;
import org.openeccos.widgets.PDComboModel.MyListEntry;

import echopointng.SelectFieldEx;

public class PDCombo<T> extends SelectFieldEx {

	public PDCombo() {
		this(null);
	}

	public PDCombo(T[] values) {
		this(values, false);
	}

	public PDCombo(T[] values, boolean emptyEntry) {
		super(new PDComboModel<T>());
		PDComboModel<T> model = getModel();
		if (emptyEntry) {
			model.add(" ", null);
		}
		if (values != null) {
			for (T o : values) {
				model.add(o);
			}
		}
		init2();
		setSelectedIndex(0);
	}

	public PDCombo(List<T> list, boolean emptyEntry) {
		this((T[])list.toArray(), emptyEntry);
	}

	private void init2() {
		setHeight(new Extent(18));
		setInsets(new Insets(0, 0, 0, 0));		
		setBorder(new Border(1, Color.LIGHTGRAY, Border.STYLE_SOLID));
		setDisabledBorder(new Border(1, Color.LIGHTGRAY, Border.STYLE_SOLID));
		setDisabledBackground(EccosDefaultLookAndFeel.DISABLED_BACKGROUND);
		setDisabledForeground(EccosDefaultLookAndFeel.DISABLED_FOREGROUND);
	}

	// allow empty entries in the combo - a "null" entry would throw an exception
	@Override
	public T getSelectedItem() {
		if (super.getModel().size() == 0) {
			return null;
		}
		Object o = super.getSelectedItem();
		if (PDUtil.isEmpty(o)) {
			return null;
		}
		return (T)((MyListEntry)o).value;
	}

    public PDComboModel<T> getModel() {
        return (PDComboModel<T>)super.getModel();
    }

    @Override
    public void setModel(ListModel lm) {
    	if (!(lm instanceof PDComboModel)) {
        	throw new IllegalArgumentException ("Model must be of type PDComboModel");
    	}
    	super.setModel(lm);
    }

    @Override
    public void setSelectedItem(Object item) {
    	if (item == null) {
    		setSelectedIndex(0);
    	} else {
    		setSelectedIndex(getModel().getEntryIndex(item));
    	}
    }
}
